CN202711943U - Built-in heating device of sulfur hexafluoride current transformer - Google Patents
Built-in heating device of sulfur hexafluoride current transformer Download PDFInfo
- Publication number
- CN202711943U CN202711943U CN 201220421885 CN201220421885U CN202711943U CN 202711943 U CN202711943 U CN 202711943U CN 201220421885 CN201220421885 CN 201220421885 CN 201220421885 U CN201220421885 U CN 201220421885U CN 202711943 U CN202711943 U CN 202711943U
- Authority
- CN
- China
- Prior art keywords
- sulfur hexafluoride
- hexafluoride current
- current transformer
- built
- mutual inductor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- 229910018503 SF6 Inorganic materials 0.000 title claims abstract description 40
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 229960000909 sulfur hexafluoride Drugs 0.000 title claims abstract description 40
- 238000010438 heat treatment Methods 0.000 title abstract 4
- 238000005485 electric heating Methods 0.000 claims abstract description 10
- 239000012212 insulator Substances 0.000 claims abstract description 7
- 229910052573 porcelain Inorganic materials 0.000 claims description 9
- 238000010079 rubber tapping Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 10
- 230000007613 environmental effect Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 5
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 230000029058 respiratory gaseous exchange Effects 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910018487 Ni—Cr Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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- Resistance Heating (AREA)
Abstract
The utility model relates to a built-in heating device of a sulfur hexafluoride current transformer. The built-in heating device of the sulfur hexafluoride current transformer is characterized in that an electric heating unit is arranged at the lower end of an insulator (3) of the sulfur hexafluoride current transformer and is connected with an external power through wires. According to the proof of tests, the possibility that micro-water is over standard even condensed in partial lower-temperature areas inside the sulfur hexafluoride current transformer is effectively lowered, and therefore the possibility of failures is lowered. The heating device is used to heat the low-temperature areas inside the sulfur hexafluoride current transformer, the temperature difference inside the sulfur hexafluoride current transformer is lowered, the distribution of temperature is uniform, and therefore the possibility that partial micro water is over standard in the sulfur hexafluoride current transformer caused by rapid change of environmental temperature is lowered.
Description
Technical field
The utility model relates to the built-in heater of a kind of sulfur hexafluoride current mutual inductor.
Background technology
In the electrical network of 35kV and above, the most SF that adopt of sulfur hexafluoride current mutual inductor (CT)
6As dielectric.During the CT load carrying, a guide rod (8) current flowing is hundreds of peaces, becomes thermal source larger in the CT.Because its inversion type structure, namely the high-pressure side is on the top, and insulating gas SF
6Heat conductivility relatively poor and the interior metal conductive coefficient is larger, certainly will cause to have certain temperature difference in the CT.This temperature difference is also so that the temperature of the interior material inwall of CT is uneven, and is also inhomogeneous in " breathing phenomenon " degree that its surface occurs.
Theoretical research shows, the saturated vapour pressure variation with temperature of water vapour and changing, and temperature height then saturated vapour pressure is high, and the low then saturated vapor of temperature forces down.Under a certain temperature, the micro-water content vapour pressure that reaches capacity then can produce condensation, causes flashover voltage sharply to descend, thereby causes the accident.
Experimental results show that SF
6Current transformer is at long-play, because its internal material and SF
6There is " breathing phenomenon " in the gas, namely transfer to SF at little water of the high regional CT internal material absorption of temperature
6In the gas, and at the low regional SF of temperature
6Little water in the gas can be adsorbed on the interior material surface of CT." breathing phenomenon " degree exists uniform temperature poor and different because of CT inside.When ambient temperature sharply descends the degradation inducement to occur, may cause in the CT the low regional area of temperature to occur that little water exceeds standard even condensation and breaking down.
The utility model content
The purpose of this utility model provides the built-in heater of a kind of sulfur hexafluoride current mutual inductor, can reduce temperature difference in the sulfur hexafluoride current mutual inductor, reduces the possibility that local little water exceeds standard to occur.
The built-in heater of a kind of sulfur hexafluoride current mutual inductor, its special feature is: the insulator lower end at sulfur hexafluoride current mutual inductor is equipped with electric heating unit, and this electric heating unit is connected with external power source by wire.
Wherein thereby wire tapping from the fairlead of sulfur hexafluoride current mutual inductor stretches in the fairlead and is connected with external power source.
Wherein electric heating unit adopts resistance wire.
Wherein be fixed with porcelain knob at the flange that links to each other with sulfur hexafluoride current transformer base, thereby have mounting groove at this porcelain knob resistance wire be installed.
Wherein resistance wire is annular and is looped around outside the fairlead.
Through evidence, adopt and effectively to reduce in the sulfur hexafluoride current mutual inductor the low regional area of temperature behind the utility model and occur that little water exceeds standard even the possibility of condensation, thereby reduced the probability that breaks down.Heat to sulfur hexafluoride current mutual inductor internal temperature lower region by this heater, so that the sulfur hexafluoride current mutual inductor internal difference in temperature dwindles temperature distribution uniform.Can lower like this because ambient temperature sharply changes and cause occurring in the sulfur hexafluoride current mutual inductor possibility that local little water exceeds standard.
Description of drawings
Accompanying drawing 1 is structural representation of the present utility model.
Embodiment
As shown in Figure 1, the utility model is the built-in heater of a kind of sulfur hexafluoride current mutual inductor, in insulator 3 lower ends of sulfur hexafluoride current mutual inductor electric heating unit is installed, and this electric heating unit is connected with external power source by wire.
Wherein wire tapping from the fairlead 4 of sulfur hexafluoride current mutual inductor stretches in the fairlead 4 and is connected with external power source, electric heating unit adopts resistance wire 9, specifically be fixed with porcelain knob at the flange that links to each other with sulfur hexafluoride current transformer base 1, have mounting groove at this porcelain knob thereby resistance wire 9 is installed, and resistance wire 9 is annular and is looped around outside the fairlead 4.
The installation region of resistance wire 9 is temperature lower in the sulfur hexafluoride current mutual inductor in the utility model, according to the emulation experiment to sulfur hexafluoride current mutual inductor internal temperature field, be defined as insulator 3 lower ends, so heater can be placed on the flange that links to each other with sulfur hexafluoride current transformer base 1, resistance wire 9 and flange are isolated with insulating material, for example porcelain knob.
Resistance wire 9 is designed to annular, is through sulfur hexafluoride current mutual inductor lead pipe 4 outsides.
Resistance wire 9 can adopt the nickel chromium triangle material.According to the emulation experiment to sulfur hexafluoride current mutual inductor internal temperature field, its temperature difference can reach about 35 ℃.Check in SF
6The specific heat of gas is 665.18J/kg.K.According to formula Q=Cm △ t, can estimate the power of required resistance wire 9.This device can external 220V power supply, and resistance wire 9 is annular, from resistance wire 9 both sides lead-in wire, and on the fairlead 4 of sulfur hexafluoride current mutual inductor the perforate lead-in wire, be connected on the external power supply by patchboard.Resistance wire 9 is placed on the less solid porcelain knob, and porcelain knob can both can be used to support and isolation resistance silk 9 and metal flange according to resistance wire 9 shapes fluting, made things convenient for again fixed resistance silk 9.
Sulfur hexafluoride current mutual inductor as shown in Figure 1 comprises base 1, lower flange 2, insulator 3, fairlead 4, upper flange 5, disc insulator 6,7, guide rods 8 of secondary shield cover and resistance wire 9.
Claims (5)
1. built-in heater of sulfur hexafluoride current mutual inductor, it is characterized in that: insulator (3) lower end at sulfur hexafluoride current mutual inductor is equipped with electric heating unit, and this electric heating unit is connected with external power source by wire.
2. the built-in heater of sulfur hexafluoride current mutual inductor as claimed in claim 1 is characterized in that: wherein wire from the upper tapping of the fairlead (4) of sulfur hexafluoride current mutual inductor stretch into fairlead (4) thus in be connected with external power source.
3. the built-in heater of sulfur hexafluoride current mutual inductor as claimed in claim 1 or 2 is characterized in that: wherein electric heating unit adopts resistance wire (9).
4. the built-in heater of sulfur hexafluoride current mutual inductor as claimed in claim 3, it is characterized in that: wherein be fixed with porcelain knob at the flange that links to each other with sulfur hexafluoride current transformer base (1), thereby have mounting groove at this porcelain knob resistance wire (9) be installed.
5. the built-in heater of sulfur hexafluoride current mutual inductor as claimed in claim 4 is characterized in that: wherein resistance wire (9) is for annular and be looped around outside the fairlead (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220421885 CN202711943U (en) | 2012-08-24 | 2012-08-24 | Built-in heating device of sulfur hexafluoride current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220421885 CN202711943U (en) | 2012-08-24 | 2012-08-24 | Built-in heating device of sulfur hexafluoride current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202711943U true CN202711943U (en) | 2013-01-30 |
Family
ID=47592222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220421885 Expired - Fee Related CN202711943U (en) | 2012-08-24 | 2012-08-24 | Built-in heating device of sulfur hexafluoride current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202711943U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105356311A (en) * | 2015-10-16 | 2016-02-24 | 国网天津市电力公司 | Local cold surface heating and heat preservation anti-condensation method for switch cabinet and switch cabinet employing local cold surface heating and heat preservation anti-condensation method |
| CN105719889A (en) * | 2016-04-01 | 2016-06-29 | 南昌大学 | Energy-saving heating and dehumidification device built in high-voltage SF6 circuit breaker |
| CN107831464A (en) * | 2017-10-09 | 2018-03-23 | 中国电力科学研究院 | A kind of standard potential transformer device to be worked under the conditions of extremely trembling with fear and method of calibration |
| CN109119237A (en) * | 2017-06-26 | 2019-01-01 | 河南平芝高压开关有限公司 | Heating removes tidal current transformer and metal enclosed switchgear |
-
2012
- 2012-08-24 CN CN 201220421885 patent/CN202711943U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105356311A (en) * | 2015-10-16 | 2016-02-24 | 国网天津市电力公司 | Local cold surface heating and heat preservation anti-condensation method for switch cabinet and switch cabinet employing local cold surface heating and heat preservation anti-condensation method |
| CN105719889A (en) * | 2016-04-01 | 2016-06-29 | 南昌大学 | Energy-saving heating and dehumidification device built in high-voltage SF6 circuit breaker |
| CN109119237A (en) * | 2017-06-26 | 2019-01-01 | 河南平芝高压开关有限公司 | Heating removes tidal current transformer and metal enclosed switchgear |
| CN109119237B (en) * | 2017-06-26 | 2021-09-07 | 河南平芝高压开关有限公司 | Heating and dehumidifying type current transformer and metal-enclosed switchgear |
| CN107831464A (en) * | 2017-10-09 | 2018-03-23 | 中国电力科学研究院 | A kind of standard potential transformer device to be worked under the conditions of extremely trembling with fear and method of calibration |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130130 Termination date: 20210824 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |